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| Titel |
First results obtained by the Cluster STAFF experiment |
| VerfasserIn |
N. Cornilleau-Wehrlin, G. Chanteur, S. Perraut, L. Rezeau, P. Robert, A. Roux, C. Villedary, P. Canu, M. Maksimovic, Y. Conchy, D. Hubert, C. Lacombe, F. Lefeuvre, M. Parrot, J. L. Pinçon, P. M. E. Décréau, C. C. Harvey, Ph. Louarn, O. Santolík, H. St. C. Alleyne, M. Roth, T. Chust, O. Contel, STAFF Team |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 21, no. 2 ; Nr. 21, no. 2, S.437-456 |
| Datensatznummer |
250014567
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| Publikation (Nr.) |
 copernicus.org/angeo-21-437-2003.pdf |
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| Zusammenfassung |
The Spatio Temporal
Analysis of Field Fluctuations (STAFF) experiment is one of the five
experiments, which constitute the Cluster Wave Experiment Consortium (WEC).
STAFF consists of a three-axis search coil magnetometer to measure magnetic
fluctuations at frequencies up to 4 kHz, a waveform unit (up to either 10 Hz or
180 Hz) and a Spectrum Analyser (up to 4 kHz). The Spectrum Analyser combines
the 3 magnetic components of the waves with the two electric components
measured by the Electric Fields and Waves experiment (EFW) to calculate in real
time the 5 × 5 Hermitian cross-spectral matrix at 27 frequencies distributed
logarithmically in the frequency range 8 Hz to 4 kHz. The time resolution
varies between 0.125 s and 4 s. The first results show the capabilities of the
experiment, with examples in different regions of the magnetosphere-solar wind
system that were encountered by Cluster at the beginning of its operational
phase. First results obtained by the use of some of the tools that have been
prepared specifically for the Cluster mission are described. The
characterisation of the motion of the bow shock between successive crossings,
using the reciprocal vector method, is given. The full characterisation of the
waves analysed by the Spectrum Analyser, thanks to a dedicated program called
PRASSADCO, is applied to some events; in particular a case of very confined
electromagnetic waves in the vicinity of the equatorial region is presented and
discussed.
Key words. Magnetospheric physics
(magnetopause, cusp and boundary layer) – Space plasma physics (waves and
instabilities; shock waves) |
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